I handed out Casascius coins a couple of years ago, and some bit cents last year. So far the family has been excited about the returns, and I plan on handing out more this year.
In fact, I was actually planning on writing up a post, something like "A Family's Introduction to Bitcoin", after this holiday, since I plan to hand out $5-$10 in Bitcoin to anyone in the family, young or old, who wants it. I've noticed interesting trends and sticking points that I think others might find insightful.
Some family members are just cooler then others. After seeing the returns on those coins from a couple years ago they will be pretty excited to get more!